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# If A, then B. If B, then C. If C, then D. If all of the

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Senior Manager
Joined: 17 Oct 2006
Posts: 432

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If A, then B. If B, then C. If C, then D. If all of the [#permalink]

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25 Oct 2006, 10:56
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If A, then B.
If B, then C.
If C, then D.
If all of the statements above are true, which of the following must also be true?
(A) If D, then A.
(B) If not B, then not C.
(C) If not D, then not A.
(D) If D, then E.
(E) If not A, then not D.

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Manager
Joined: 28 Aug 2006
Posts: 159

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25 Oct 2006, 11:17
Anwer is C. What is the OA??

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Senior Manager
Joined: 17 Oct 2006
Posts: 432

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25 Oct 2006, 11:30
OA is C. I got the logic now..

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VP
Joined: 21 Aug 2006
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25 Oct 2006, 20:28
arjsingh1976 wrote:
OA is C. I got the logic now..

My friend, please dont post OAs so fast. Why not we take others' perspectives as well??
_________________

The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.

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Current Student
Joined: 29 Jan 2005
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25 Oct 2006, 23:21
Formal logic CR. Helps to draw a diagram. The answer is (C) because the only way we could derive D is if A were to start. Think of it as a dependent chain reaction.

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25 Oct 2006, 23:21
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# If A, then B. If B, then C. If C, then D. If all of the

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